Abstract: In order to arrange molded parts such as bumpers or their trim for automotive vehicles with maximum integration into the body, i.e. in order to attain a most extensively contour-hugging transition from the sheet-metal to the plastic geometry of the vehicles, the juncture between the topside of the molded part and the body panel located thereabove must be kept as narrow as possible. For this purpose, a guide rail to be attached to the body panel of the vehicle is provided which has an elongated slot formed between two webs. The molded part is inserted with a sliding seat with its strip-shaped projection into the elongated slot. The thickness of the top web determines the dimension of the juncture, i.e. the web serves as a spacer.

Abstract: There is described a dust exhaustor for a precision-mechanics work table which can be fitted as a ready-to-connect unit beneath the work top of a conventional work table. For this purpose, the housing is L-shaped, the suction opening being in the front end of the substantially horizontal leg of the housing and the large-surface outlet(s) being in the vertical leg of the housing. The housing bounds, in its installed position, the foot or knee region for the user of the work area.

Abstract: A file folder having a fastener mechanism on the inside and provided with a wide back for carrying identification markings and covers extending from the wide back. The folder is made of one piece of hard cardboard on its open side, and has an additional narrow identification back. This narrow identification back, as well as the wide identification back, is connected by folding and bending with an adjacent cover each, through a side edge strip connected in one piece and produced by folding and bending. The side edge strip reaches around the free edge of the other folder cover and is disconnectably attached to it. The side edge strip of the additional narrow identification back has, on its free edge, a projecting insertion tongue, and the facing folder cover has an associated insertion slot.

Abstract: Device for crucible-free zone melting a crystalline rod, end-supported by holders, one of the holders being rotatable about the longitudinal axis thereof, includes an induction heating coil disposed between the end holders and coaxial to the longitudinal axis, the induction heating coil being energizable for heating a molten zone formed in the crystalline rod and comprising at least one winding disposed in a single plane, and a connecting lead to the induction heating coil, the connecting lead being formed as a partial winding and disposed outside the plane on a side thereof facing the rotatable holder; and method of operating the device.

Abstract: An improved method of manufacturing a tubular conductor which consist of a niobium layer and a copper layer, in which one side of a tube of electrolytic copper is plated with niobium by fusion electrolysis and the tube section thus produced, then drawn in several cold drawing passes to reduce the outside diameter and the wall thickness of the tube to form a longer tube, resulting in simplified production of seamless tubes, particularly useful in superconducting cables and having good mechanical, thermal and electrical contact between the niobium and copper layers.

Abstract: A method for electrolytically polishing the inside surface of hollow niobium bodies in which the niobium body acting as an anode is partially immersed in electrolyte and a voltage applied at a current causing oscillations to take place to cause polishing of the niobium body, after which the voltage is disconnected and the oxide layer generated during polishing dissolved. In accordance with the disclosed invention, during the application of the constant voltage, the hollow niobium body is slowly rotated about its axis of rotation at a speed so low that the development of the damped oscillations is not disturbed, with the rotation stopped during the subsequent dissolution of the oxide layer and then a further rotation carried to immerse parts which have not been previously polished after which the steps are repeated.

Abstract: A construction toy comprising a plurality of flat members constituting flat bars and/or assembly members formed with openings therein. Separate coupling means are provided for coupling the members and include resilient protrusions releasably engaging in the openings of the members to be coupled. The members are formed with surface recesses in the flat sides arranged axially symmetrically with respect to the openings, and the coupling means includes projections complementary in shape to that of the surface recesses and which engage therein when the members are coupled by the coupling means, the projections constituting at least two pins complementary in arrangement to that of the surface recesses. Slots equal in width to the thickness of the members are provided in the edges, and the edges are beveled and define edge recesses therebetween.

Abstract: A method for manufacturing tubular conductors which consist of a niobium layer and a layer of normal electrically conducting metal in which a copper body of rectangular cross section is covered with niobium on one wide and two narrow sides by means of fusion electrolysis and the resulting body then rolled to form a ribbon which is then bent to form a tube with the niobium flanges at the two edges of the ribbon abuting and welded together by electron beam welding. Tubular conductors made according to the method of the present invention are particularly suited for use as superconducting cables.

Abstract: A hollow niobium body, rotatable about a horizontal axis, is arranged for partial immersion in an electrolyte of H.sub.2 SO.sub.4, HF and H.sub.2 O. A generally concentric opening at one end receives a cathode. Evolved gases rise therefrom and escape into a vapor space above without contacting the immersed surfaces of the niobium body. The cathode is hollow and is perforate in the portion introduced into the body in order to feed electrolyte into the body. For polishing, constant electric voltage is applied between the hollow niobium body and the cathode and adjusted in such a manner that damped current oscillations occur which are superimposed on the electrolytic current. Not later than after the complete decay of the current oscillations, the voltage is turned off until the oxide layer built up during the current oscillations is dissolved.